About Pool Calculate Hub
Free pool calculators that show their inputs, units and assumptions — built for everyday pool care
Our Mission
To make pool ownership simpler and more affordable with free calculators that show their inputs, units and assumptions instead of hiding them behind a black box.
We believe pool owners should have access to practical calculation tools without expensive subscriptions or complicated software.
Free Calculation Tools
Pool Volume Calculator
Calculate volume for common pool shapes in gallons and litres
Chemical Calculators
Calculate doses for pH, chlorine, alkalinity and more
Cost & Energy Calculators
Estimate fill, heating, chemical, and pump costs
Specialty Tools
Heating time, salt water conversion, and shock treatment
Educational Resources
How-To Guides
Step-by-step instructions for pool maintenance and care
Water Chemistry Help
Understanding pool chemistry and balancing your water
Seasonal Care Tips
Opening, closing, and year-round maintenance schedules
Troubleshooting Guide
Solving common pool problems like cloudy water and algae
How we approach accuracy and privacy
Accuracy
Our formulas use published pool-industry constants, and each calculator shows the inputs behind its result
Privacy
We use Google Analytics to understand which pages are useful. Your saved pool calculations stay on your device.
Accessibility
Mobile-friendly layouts with large touch targets and clear unit labels
Ready to simplify your pool maintenance?
Start with the pool volume calculator, or explore the full set of free calculators and guides.